Specific: 4 standard D7C were
purchased in 1957 around s/n 17A7200 (shown to the left.
Historical: The D7C model was introduced in 1955
with new and more powerful models as the D7D, D7E and D7F
following. The current D7G model has served both in the
Gulf War and in Bosnia and both have been fitted with an
armoured cab and chain flail device for mine clearance.
US Army designation was "Tractor, Full-Tracked,
Low-Speed, DED, Medium DBP, with Hydraulic
Used for general bulldozing, pan pushing, tree dozing,
scraper towing and other types of construction work.
Apart from the above mentioned tasks, the D7 could be
used as tractor for a 240 mm howitzer and a 155 field
Length: 4.26 m (166 inches), w/dozer 5.80 m (226
Width: 3.38 m (132 inches), w/dozer 4.10 m (160
Height: 2.44 m (96 inches).
Weight: 12.300 kg (27.060 lb.), w/attachment
approximately 16.000 kg. (35.200 lb.).
Engine: Caterpillar 4-cylinder, type D399PC, 13.618
cm3 (831 cubic inches), liquid cooled.
Horsepower: 128 at 1.250 rpm.
Transfer case: N/A.
Electrical system: 6 volt.
Brakes: Individual oil cooled multi plate steering
clutch and brake for each side.
without preparation: N/A.
Fuel type: Diesel.
Fuel capacity: 303 liter (66 gallons).
Additional: A 2-cylinder vertical
gasoline engine was fitted to the left hand side of the
diesel engine. This starting engine had electrical start.
The starting engine exhaust pipe provided preheating for
main engine intake air.
The machine were fitted with Caterpillar No46 Hydraulic
Control for Bulldozer and either with a rear fitted No 25
double drum Cable Control for Scraper or a Hyster D7N 15